diff options
Diffstat (limited to 'drivers/gpu/drm/drm_file.c')
| -rw-r--r-- | drivers/gpu/drm/drm_file.c | 44 |
1 files changed, 43 insertions, 1 deletions
diff --git a/drivers/gpu/drm/drm_file.c b/drivers/gpu/drm/drm_file.c index ea34bc991858..92d16724f949 100644 --- a/drivers/gpu/drm/drm_file.c +++ b/drivers/gpu/drm/drm_file.c @@ -31,7 +31,9 @@ * OTHER DEALINGS IN THE SOFTWARE. */ +#include <linux/anon_inodes.h> #include <linux/dma-fence.h> +#include <linux/file.h> #include <linux/module.h> #include <linux/pci.h> #include <linux/poll.h> @@ -285,7 +287,7 @@ static int drm_cpu_valid(void) } /* - * Called whenever a process opens /dev/drm. + * Called whenever a process opens a drm node * * \param filp file pointer. * \param minor acquired minor-object. @@ -754,3 +756,43 @@ void drm_send_event(struct drm_device *dev, struct drm_pending_event *e) spin_unlock_irqrestore(&dev->event_lock, irqflags); } EXPORT_SYMBOL(drm_send_event); + +/** + * mock_drm_getfile - Create a new struct file for the drm device + * @minor: drm minor to wrap (e.g. #drm_device.primary) + * @flags: file creation mode (O_RDWR etc) + * + * This create a new struct file that wraps a DRM file context around a + * DRM minor. This mimicks userspace opening e.g. /dev/dri/card0, but without + * invoking userspace. The struct file may be operated on using its f_op + * (the drm_device.driver.fops) to mimick userspace operations, or be supplied + * to userspace facing functions as an internal/anonymous client. + * + * RETURNS: + * Pointer to newly created struct file, ERR_PTR on failure. + */ +struct file *mock_drm_getfile(struct drm_minor *minor, unsigned int flags) +{ + struct drm_device *dev = minor->dev; + struct drm_file *priv; + struct file *file; + + priv = drm_file_alloc(minor); + if (IS_ERR(priv)) + return ERR_CAST(priv); + + file = anon_inode_getfile("drm", dev->driver->fops, priv, flags); + if (IS_ERR(file)) { + drm_file_free(priv); + return file; + } + + /* Everyone shares a single global address space */ + file->f_mapping = dev->anon_inode->i_mapping; + + drm_dev_get(dev); + priv->filp = file; + + return file; +} +EXPORT_SYMBOL_FOR_TESTS_ONLY(mock_drm_getfile); |